Multi-view-field medium-wave infrared optical system and view field switching method thereof

Abstract

The invention relates to the field of forward-looking infrared imaging systems, in particular to a multi-view-field medium-wave infrared optical system and a view field switching method thereof. The system is composed of a first meniscus positive lens, a secondary reflecting mirror, a first double-concave negative lens, a first double-convex positive lens, a first meniscus negative lens, a secondmeniscus negative lens, a second double-concave positive lens, a second double-convex negative lens, a main reflecting mirror, a second meniscus positive lens, and an imaging plane that are distributed at the optical axis successively and coaxially from an object side to an image side. The system has a simple structure; the view field switching time is short and is controlled to be within 1s; theimaging quality is high; the optical axis consistency during the view field switching process can reach one pixel; and compared with the existing single-view-field and continuous zoom infrared opticalsystems, the multi-view-field medium-wave infrared optical system is simple and practical.

Description

technical field [0001] The invention relates to the field of forward-looking infrared imaging systems, in particular to a multi-field mid-wave infrared optical system and a field-of-view switching method. Background technique [0002] Since the forward-looking infrared (FLIR) imaging system is passive detection, it has the characteristics of good concealment and strong anti-electronic interference, and can quickly obtain target information in the covered airspace. It has been widely used in guidance, monitoring, target detection and tracking, etc. field. [0003] In the forward-looking infrared system, the infrared optical system is the first link to obtain target information. The infrared optical system is divided into single-field, multi-field, and continuous zoom. Due to the single function of the single-field infrared optical system, the actual use is limited, and it is difficult to meet the development needs of modern infrared optical systems. The advantage of the con...

AI Technical Summary

Problems solved by technology

However, the structure of the continuous zoom system is complex, difficult to install and adjust, and it is difficult to guarantee the accuracy of the focal length and the consistency of the optical axis during the zooming process.

In addition, the zoom time of continuous zoom is long, currently about 6s

However, the situation on the battlefield is changing rapidly, and fighters are fleeting, so too long a field of view switching time will delay fighters

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